Blind source separation (BSS) [1]} is a technique that separates an observed multichannel signal
into each source signal without any prior information about each source or the mixing system.
In a determined or overdetermined situation (number of sensors \(\ge \)  number of sources),
frequency-domain independent component analysis (FDICA) [2]}, [3]}, [4]},
independent vector analysis (IVA) [5]}, [6]}, [7]},
and independent low-rank matrix analysis (ILRMA) [8]}, [9]}, [10]}, [11]}, [12]}
have been proposed for audio BSS problems.
